Antisiphoning structure for ball cocks



Jan. 10, 1956 B. SVIRSKY 2,730,117

ANTISIPHONING STRUCTURE FOR BALL COCKS Filed Aug. 5, 1952 9 7 Q i iii. 34 flab 20 6 36 LS 5 I16. 4.

1 N VEN TOR.

W r ,lrraeA/fy ANTISIPHONING STRUCTURE FOR BALL COCKS Bennett Svirsky, Los Angeles, Calif., assignor, by direct and mesne assignments, to Free-Gold Enterprises, Inc, Los Angeles, Calif.

Application August 5, 1952, Serial No. 302,761

2 Claims. (Cl. 137217) This invention relates to improvements in the antisiphoning structures of ball cocks.

It is not altogether new in the art of plumbing to provide antisiphoning means for ball cocks, for applicant already has to his credit patented structures of this character. However in some of these as well as other patented structures the pressure built up by the confined water in the chambered ball cock has been relied upon to a certain degree to secure the desired positiveness of action and to assist in operating the antisiphoning mechanism, rather than to rely solely upon the direct jetting action of the inflowing water around the valve proper to completely perform this action.

Accordingly it is an important object of the present invention to novelly construct and combine the parts so that when a flushing operation takes place the water passing from the supply pipe into the chamber head will first all be forcefully directed against the floating washer which is responsible for elevating the antisiphon washer against its seat, so as to more quickly and efficiently guarantee that no water passes through the antisiphon holes which the antisiphon washer is intended to screen, this action being accomplished by the entering water jetting past the valve plunger and against the floating washer on its way into the tank rather than depending upon subsequent built up Water pressure to perform a part of this function.

Other objects, advantages and features of invention will hereinafter appear.

Referring to the accompanying drawing illustrative of a preferred embodiment of the invention as now reduced to practice,

Fig. 1 is a fragmentary top plan view.

Fig. 2 is a fragmentary longitudinal midsection of the device showing the valve in the open position with some parts appearing in side elevation.

Fig. 3 is a transverse section taken on line 3-3 of Fig. 2.

Fig. 4 is a view similar to Fig. 2 except that the valve is shown in the closed position and more structure nearer the observer is shown in side elevation to disclose the vertical location of the refill tube shown in plan in Fig. 1.

Referring in detail to the novel antisiphon ball cock head shown in Figs. 1 to 4 of the drawing, it will be seen that said head comprises in general a circular casing consisting of two parts indicated 5 and 6 respectively; that said part 5 is the upper part or cap and said part 6 is the lower part or base, and that said upper part 5 simulates an inverted cup and has its skirt portion internally screwthreaded to screw onto external screwthreads carried by the rim portion of said base, said base having an annular ledge 7 against which the bottom edge of the cap abuts with exact nicety when fully screwed down.

Into the bottom side of the base 6 is screwed two vertically extending pipes, the pipe designated 8 constituting the supply pipe and pipe indicated 9 constituting the hush pipe. Pipe 8 is located axially of the base while pipe 9 is located eccentric thereto. Pipes 8 and 9 are conventional to a certain degree, such pipes being shown in ap- States Patent 0 2,730,117 Patented Jan. 10, 1956 plicants co-pending application filed February 15, 1951, Ser. No. 210,674, and since their relationship and connection with the conventional closet tank is the same as therein shown, no further explanation here as to assembly and operation is necessary in order to make that portion of the disclosure understandable.

Base 6 has on its bottom side a downwardly projecting, thickened, circular portion 10 whereinto is tapped the aforementioned supply and hush pipes, the end of the supply pipe 8 terminating flush with the bottom of the cylindrical well 11 which upstands part way into the open mouthed chamber 12 and around which extends an annular sump 13. Said chamber 12 co-operates with the space 14 provided by the interior of the cap 5 to enclose a spacious chamber within which to house the working parts comprising the essence of the invention soon hereinafter to be described in detail.

Into the upper open end of the supply pipe 8 is screwed a tubular valve seat 15, said valve seat extending upwardly part way into the well 11 so that a tool may be applied thereto to remove it in case it is necessary to replace it with a new one.

The upper end of the hush pipe screws into a threaded bore in said thickened portion and when fully seated abuts the annular shoulder 16, the unthreaded portion 17 of said bore communicating with said sump.

The bottom of the cap 5 which overlies the mouth of the chamber 12 is circular and flat, and downwardly from the peripheral edge of said circular flat vertically extends part way an annular wall 18, the axis of which coincides with the axis of the supply pipe as well as with the annular well 11 formed in the central bottom portion of the base 6.

Concentrical with the aforesaid wall 18 is a cylindrical guide sleeve 19 and the casing cap is provided with a circular central bore 21 which forms a continuation of the hollow portion of the guide sleeve 19. Bore 20 is continued through a cylindrical upward extension 21 carried by the central portion of the cap which is provided with a thickened side portion 22 and a vertical cut 23 extends radially outward from the continued bore through said thick side to provide a bifurcation in which to pivotally mount the flattened inner end portion 24 of the float lever 25. Into the outer end of the lever 25 is tapped the inner end of the float rod 26 and upon the free end of said float rod is mounted the float 27.

The inner end of the float lever 25 is forked at 28 and straddles a pin 29 carried by the bifurcated upper end portion 30 of the valve plunger 31. Said lever is fulcrumed upon a cotter pin 32 which bridges the vertical cut 23 in said thickened side portion. Said pin 29 is located close to the fulcrum pin 32 carried by the cap, so that the float lever 25, when acted upon by the float rod 26 under the urge of the float 27, will exert the necessary leverage upon the plunger valve 31.

At the juncture of the plunger stem 30 with the plunger valve 31 is an upwardly facing circumferential ledge 33 which, by its contact with the lower end of the guide sleeve 19, limits the upward travel of the plunger during flushing operation of the toilet bowl. Also upon said ledge rests the plastic float washer 34 after the closet tank has been filled and the float 27 operated to the upper limit of its travel as indicated in Fig. 4. Said float washer has an axial bore 35 sufliciently large to prevent frictional resistance between it and the guide sleeve 19 which it surrounds, in the travel of said washer from the position shown in Fig. 2 to the position shown in Fig. 4 and vice versa.

The central area of the float washer is thicker than the peripheral portion thereof in order to provide space in which to form the annular, circumferential groove 36 which, in the mounted position of the washer faces the circular opening 37 between the inner circular wall of the well 11 and the outer periphery of the plunger valve 31. Locating the groove 36 directly above and in line with the water issuing through the opening 37 in a forceful jet formation when the closet tank is flushed, provides in a superior manner for more quickly and positively seating the antisiphon washer 38 against the flat bottom of the cap to prevent inrushing water from being spurted through the antisiphon holes 39 in the top of the cap.

The seating and sealing of the antisiphon washer 38 against the flat surface as aforesaid is augmented by the concentric knife edged ribs 40 formed on the upper side of the washer and defining a zone which includes the antisiphon holes 39.

The washer 38 is preferably made of neoprene" or its equivalent and the ribs 40 by virtue of their knife edges are easily flexed when their sharp edges abut the flat underside of the cap. Thus, when the water pressure is reduced at the completion of the seating of the plunger valve, the force stored up by flexing the ribs will cause them, upon relaxing, to de-seat the antisiphon washer, whereupon it will gravitate with the float washer to the position shown in Fig. 4 to leave the antisiphon holes 39 completely open to the supply line when the main water supply line to building is shut off. The full seating of the outer rib is further enhanced by reason of the float washer 34 being made somewhat less in diameter than the antisiphon washer 38.

Radially extending from the side of the cap 5, in a position to direct some water into the overflow pipe of the closet tank during flushing operations of the toilet bowl, is a bored boss 41 into which is fitted the intake end of a conventional refill tube 42, there being a radial bore 43 providing a passage from the interior of the cap to said tube 42. Thus it will be seen that the antisiphon holes 39 not only prevent water from being sucked back into the supply line through the hush pipe from the tank, but also prevent sucking back of any moisture from the overflow pipe into which the refill tube extends.

I claim:

1. An antisiphoning flush valve comprising upper and lower cupped mating members forming a chamber, a water supply opening and a hush pipe opening in the lower member, a first sleeve extending inwardly of the chamber from the lower member and circumscribing the water supply opening, a valve seat in the water supply opening housed within the first sleeve, a second sleeve of smaller diameter than the first sleeve extending from the upper member into the chamber concentrically with the first sleeve and defining a first opening in the upper member, a valve stem having a head member reciprocable within the first sleeve, and of larger diameter than the second sleeve whereby the second sleeve forms a limit stop on the displacement of the head member, and a shank member extending from the head member through the second sleeve and said first opening for engagement externally of the chamber with valve actuating means, a plurality of auxiliary holes in the upper member and annular washer means mounted around the upper sleeve to slide thereon and close the auxiliary holes under the influence of an incoming water stream when the valve stem is in open position.

2. Apparatus according to claim 1 wherein said washer means comprises a flexible annular member slidable on the second sleeve and a rigid annular member mounted below the flexible annular member and slidable on the second sleeve.

References Cited in the file of this patent UNITED STATES PATENTS 2,216,808 Delany Oct. 8, 1940 2,259,984 Anderson Oct. 21, 1941 2,290,145 Owens July 14, 1942 2,299,706 Svirsky Oct. 20, 1942 2,306,508 Svirsky Dec. 29, 1942 2,593,740 Faust Apr. 22, 1952 2,635,622 Owens Apr. 21, 1953 

